Quartz process tube



FIG. 1 a perspective view of a quartz process tube.

FIG. 2 a front elevational view thereof.

FIG. 3 a top plan view thereof.

FIG. 4 a bottom plan view thereof.

FIG. 5 a cross sectional view thereof taken along line 5--5 in FIG. 2.

FIG. 6 a left side view thereof.

FIG. 7 a rear elevational view thereof.

FIG. 8 a right side view thereof; and,

FIG. 9 a cross sectional view thereof taken along line 9--9 in FIG. 3. 

The ornamental design for a quartz process tube, as shown. 